Cover clamp for pressure cooking vessels



March 14, 1933'. BURPEE 1,901,699

COVER CLAMP FOR PRESSURE COOKING VESSELS Filed March 30, 1931 Patented Mar. 14,

FRANK W. BUBPEE, OB TTS, ILLINQIB,

Flc-

sserbnon no; nuarnn. can

UQKPAHY, F CHICAGQ, 018, A CQBEGMTIQN 0F ILLIHGIE COVER cum 3GB rnnssu'nn :2. thr at Application mammal so, near. Serial no. reason.

' clamping these ribs together.

fentent necessary, to enable the iflanges thereof to clear the ribs of in one tye of pressure'cooker a clamping ring or and equip ed with up er and lower inwardly directed flanges em racing the ribs has been proposed. Such rin is usuall made in semi-circular sections hinge at one meeting end and at their other ends provided with means for tightl drawmg t e sections together around to ribs.

present invention is of the draw ring type, and its primary objectis to provide a very s mple, inexpensive and highly eficient clamp ng ring which will do away with the pivot oint heretofore used and at the same t me will be suficiently flexible to enable the ring to be expanded in its own plane to the rr s t e cover and body in applying and removing the same,

My improved cover clamp, in a selected embodiment thereof, is illustrated in the aceompanying drawing, in which- Fig. 1 1s a top plan view of the vessel sllioving the cover and the cover clamp app re f Fig. 2 is an enlarged horizontal section through the device for drawing together the ends of the clamping ring or band.

Fig. 3 is an enlarged transverse section taken on the line 3-3 of Fi 1.

Fig. 4 is an enlarged vertical section taken on the line 4-4 of i 2.

Referring to the drawing, I have'shown in Fig. 3 a fragment of the body 10 of the vessel and a fragment of the cover 11. At the upper edge of the body 10 is an annular the opposed transversely bevele external rib 12 formed with a beveled lower surface 12', and slightly above the lower edgev of the cover 11 is a similar external annular rib 13 formed with a correspondin ly beveled surface 13'.

escribing now my improved cover clamp,

14 clear ates as an entirety a one-piece circular exible metal band. This band is formed at uniformly s ace'd intervals therearound with pairs of mte ral inwardly directed divergent upper and lower marginal flanges 15 and 16 respectively, which are designed and adapted to wedgingl embrace annular ribs 13 and 12 of the cover and body of the vessel in the manner clearl illustrated in Fig. 3, and when the band is tightened, to draw said ribs toward each other, thus forcin the lower end of the cover into the upper end of the body. Y

Referring to Fig, 1, the portions of the band between adjacent pairs of flanges are designated by 17, and in designmg the clamp I have made these unflanged ortlons of the band suficient in'number an length to enable the band to be readily ex anded to clear the ribs 13 and 12 when app ying and removing the band. I have found in practice that by making the unflanged portions 17 of the band substantially equal in length to the flange themselves, and providing a. considerable number of pairs of flanges, the

desired result is'secured in a band of suflicient weight and strength to stand the strain imposed on it without the necessity of making the band in two sections hinged together.

Describing the means herein shown for drawing together the two ends of the band, to one end of the latter is attached, as by means of an eye 18 formed in a folded and riveted end of the band and a cross in.19 passed through said eye, a tension li consisting of straight parallel steel strips 20, between the other ends of which is r1g1dl mounted a nut 21 (Fig. 4), through whic extends a screw 22. The inner end of the screw is rounded to fit an indented seat 23 that is formed in vone face of a hollow abutment lugf24, this latter being conveniently i 65' nular ribs and cheapl formed by simplf bendin outwardly an thence backward y an en portion of the band and securing the same to the band by a rivet 25.

In the practical use of this cover clamp, the body 10 having been charged with the articles to be cooked and a proper amountof water, the cover 11 is then applied and forced down as tightly as possible by manual pressure. The locking band is then grasped by the screw 22 in one hand and a knob 26 (Fig. 1) thereon with the other hand and expanded sufiiciently to enable'it to pass down over the cover and the ribs 13 and 12 to a position encircling the latter. On release of the expanding pressure, the ban automatically contracts, its flan es embracing the ribs 13 and 12, and the ink 20 carrying the screw 22 is then swung inwardly, with the screw sufliciently backed oil to enable the inner end of the screw to engage with the seat 23 of the abutment lug 24, and the band is then tightened by forcing the screw inwardly by its win handle 22'. This has the efiect of power ull drawin together the meeting ends of tile band w ich, of course, at the same time draws the clampn flan es 15 and 16 inwardly on the beveled s es 0 the ribs 13 and 12, and this actlon, in turn, forces the lower end of the cover tightly into the u per end of the body, producing a substantia ly steam-tight joint, and preventin any possibility of the cover being blown o by the internal pressure.

When the cooking operation is completed, the screw 22 is backed ofi, the link 20 is swung out clear of the abutment in 23, and by means of the screw 22 and thegmob 26, the. clamping ring is spread or ex anded sufliciently to enable it to be lifted c ear of the ribs 13 and 12, and the cover can then be removed. I

The cover is provided as usual with a lifting handle 27 while the bod of the vessel is equipped with the usua oppositely dislposed li ting handles 28.

claim: 1. A cover clamp'for a pressure cooking vessel, comprising a one-piece circular flexso ible and resilient metal band formed at uniformly spaced intervals therearound with pairs of integral inwardly directed divergent marginal flanges adapted to wedgingly embrace opposed transversely beveled anon the body and cover of the vessel, the portions of said hand between said pairs 0 flanges being sufiicient in number and length to enable said band to be sufiiciently expanded to clear said ribs when applying and removing the same and means 'for tightly drawing together the ends of said band around said ribs.

2. A cover clamp for \pressure cooking vessels, comprising a one-piece circular flex- 66 ible and resilient metal band formed at uni vessel, the flanges with each other, and the spacesbetween advjacent pairs of flang the flanges themselves,

to wedgingly emb being formly spaced intervals therearound with pairs of integral inwardly directed divergent marginal flanges adapted to wedgingly embrace op nular ribs on the body and cover of the of each; pair registering es being substantially equal in length to and means for tightly drawing-together the ends of said band around said ribs.

3.A cover clamp for resilient metal band formed at spaced intervals therearound with pairs of integral inwardly directed divergent flanges adapted to wedgingly embrace opposed transversely beveled annular ribs on the body and cover of the vessel, one being bent outwardly and backwardly ant riveted to the band to form an integral abutment lug, a link connected-tothe other end of said band, and a band-tightening screw mounted in said link and at its inner end abutting against said lug. 1

4. A cover clamp for pressure cooking vessels, comprising a circular flexible andresilient metal band formed at spaced intervals therearound with pairs ,ot integral inwardly directed divergent flanges adapted race opposed transversely beveled annular ribs on the body and cover of the vessel, one end portion of said band bent outwardly and backwardly and riveted to the band to form a hollow integral abutment lug, one face of said lug having an indented seat, a link connected to the other end of said band, and a bandtightenin'g screw mounted in said link and at its inner end engaged with, the seat of said in g FRANK W. BURPEE.

osed transversely. beveled an-- pressure cooking I vessels, comprising a circularflexible and.

end portion of said band s5 

